Submit a ticketCall us

Webinar: Web Help Desk for HR, Facilities and Accounting Departments
This webinar will focus on use cases for HR, Facilities and Accounting.

Having a unified ticketing and asset management system for all the departments in your company can provide end-users with a seamless experience and make things easier for your IT team. Yet, with different business tasks and objectives, many departments don’t fully understand the capabilities of Web Help Desk and how the software can be customized for effective use in their departments.
Register Now.

Home > Success Center > Network Performance Monitor (NPM) > HTTP Error 503: The Server is unavailable

HTTP Error 503: The Server is unavailable

Updated March 11th, 2016


The following errors appear on the Orion Web Console:

Website configuration failed

Unable to restart Orion Application Pool. Please use IIS Manager to restart it manually

Web request for /Orion/Login.aspx failed - The remote server returned an error: (503) Server Unavailable


All Orion Core products


The error is caused when the configuration wizard is not able to start the application pool in IIS or after the server reboot. A sample error is shown below after running the configuration Wizard.


  1. Start the Application Pool in IIS.
  2. Launch IIS manager. Click Start > Run > inetmgr.
  3. Expand the server.
  4. Select Application Pools.
  5. Right-click SolarWinds Orion Application Pool > Start.


If this doesn't resolve issue continue on with clearing the .net cache: Refer to:

Last modified
16:25, 20 Jul 2017